Car-truck.



N0. 66l,962. Patented Nov. 20, I900. A. B. DU PONT.

CAR TRUCK.

{Application filed Aug. 29, 1889. (No Model.) 2 SheetsSheet l.

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N0. 66l,962. Patented Nov. 20, I900.

A. B. DU PUNT.

CAR TRUCK.

(Application filed Aug. 29, 1899..

(No Model.) 2 Sheets-Sheet 2.

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ANTOINE l3. DU PONT, OF DETROIT, MICHIGAN, ASSIGNOR TO THE LORAIN STEEL COMPANY, OF PENNSYLVANIA.

CAR-TRUCK.

SPECIFICATION forming part of Letters Patent No. 661,962, dated November 20, 1900.

Application filed August 29, 1899.

To all whom it may concern:

Be it known that I, ANTOINE B. DU PONT, of Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Improvement in Oar-Trucks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention has relation to certain new and useful improvements in car-trucks, and more particularly to the frames thereof, being designed to provide a simple, strong,and durable frame construction. I attain this object by the novel means which I will proceed to describe and which are particularly pointed out in the appended claims, reference being had to the accompanying drawings, in which Figure 1 is a plan View of a truck embodying my invention. Fig. 2 is a side view of the same, and Fig. 3 an end view.

The truck which I have illustrated in the drawings is of that class described and claimed in prior patents granted to me, in which the side bars of the truck are supported from and below the axle-boxes, and generally known to the trade as the Du Pont truck. These side frames are composed of two parallel edgewise-disposed side plates A A, of rolled steel, spaced from each other by distance-blocks and securely bolted or riveted together, the bars at the two sides being connected heretofore by separate end bars. In the improved frame construction shown in the drawings I dispense with the separate end bars and make the side bars of sufficient length to bend across and form the ends of the frame, the two plates being brought closely together and securely riveted, as shown. I prefer also to so arrange the two plates that the joints between their ends will come, respectively, at opposite ends of the truck. In this manner I provide a continuous rigid frame composed, in so far as its side and end members are concerned, of but two pieces, so arranged as to have a large moment of inertia and capable of holding the wheels to alinement.

B designates the truck-wheels; B,the axles; O, the aXle-boxsprings; D,the bolster; D, the

Serial No. 728,925. (No model.)

frame, composed each of two edgewise-disposed bars or plates bolted or riveted at their ends to lugs c of the bolster-guides and connected by rivets 72,, which pass through them and through interposed spacing-blocks h.

Secured to the central portion of each brakebeam is a distance-loop I, which extends toward the adjacent axle and in which is pivoted a brake-lever J or J, the lever J being the operating-lever and the lever J the deadlever. The pivot-points of these levers are a short distance above their lower ends and the said ends are pivoted to a connecting-link K. Secured to the transverse mem ber of the frame 7 5 nearest the lever J is a slotted horizontal arm K, through which the upper portion of the lever extends and which is provided with two rows of alternately-arranged perforations k to receive a pin 70, which passes therethrough and through the lever.

It will be readily seen that when the lever J is operated to set the brakes the efiect is a straight pull through the distance-loop I on the brake-beam F and a similar pull on the beam F through the link K, lever J, and the other distance-loop I. This action overcomes the tendency to twist the brake-beams and cause unequal wear of the brake-shoes, as is usually the case where the shoes are hung inside the Wheels.

By means of the plurality of perforations k, arranged alternately of each other in the two rows, the wear of the brake-shoes may be very readily and accurately taken up.

I do not wish to limit myself to the particular construction and arrangement which I have shown and described, as the same may be varied in detail without departing from the spirit and scope of my invention.

tions of said plates and supporting the carsprings and journal-boxstraps,and upwardlyextending bolsterguides also secured between and spacing the side portions of said plates, substantially as specified.

In testimony whereof I have aifixed my signature in presence of two witnesses.

ANTOINE B. DU PONT. Witnesses:

O. B. KING, WM. 0. HOPPER. 

